Why is my car hesitating to accelerate only when I first start my car?@M.Cooper: It seems like when I first start the car (in park), it idles fine. When I shift it into drive, it still seems fine. But when I first apply gas, it almost stalls out. It still hasn't completely stalled out yet. Once the car really gets going, the problem just seems to go away. If I park my car for too long of a time (like say, over night), the problem returns.